Comment # 4 on bug 107946 from Dave Johnson

Uploading 4.19_RC5 dmesg w/ drm.debug=6 set, Xorg log

Also, here's more info about my setup:

+OpenSuSE Tumbleweed
  -at this time there are no 3rd-party or non-foss additions
+KDE
  -Plasma 5.13.5
  -Frameworks 5.49.0
+Radeon RX Vega 54
  -Asus Strix
  -ROG-STRIX-RXVEGA64-O8G-GAMING
  -Part# 90YV0B00-M0NA00
+MiniDP works
+DVI port does not work
  -Except on older 4.16 of course